58 • Fieldbus Coupler 750-337, 750-338
Data
Exchange
WAGO-I/O-SYSTEM
750
CANopen
Each index has a maximum of 256 sub-indexes (sub-index 0-255).
The number of data inputs is quoted in sub-index 0, whereas in the following
sub-indices the data is filled in blocks.
The block size depends on the data width of the bus module.
Sub-Index
Contents
0
Number of Data blocks
1
First Data block with the data width of the I/O module
2
Second Data block with the data width of the I/O module
... ...
Table 3-3: Sub-indices of the bus module data in the object directory
Note
For a detailed description of setting the default configuration please refer to
chapter
Attention
A process image restructuring may result if a node is changed or extended. In
this case the process data addresses also change in comparison with earlier
ones. In the event of adding modules, take the process data of all previous
modules into account.
Example:
The bus module configuration contains :
1) 5 digital 2 channel input modules (i.e. 750-400),
2) one digital 4 channel output module (i.e. 750-504) and
3) two 2 channel analog output modules with output modules having 2 bytes
per channel (i.e. 750-552).
To 1) Index the data of the 5 digital 2 channel input modules:
Index:
Sub-
Index:
Contents: Description:
0
2
number of dig. 8 Bit input blocks
1
D4.2 D4.1 D3.2 D3.1 D2.2 D2.1 D1.2 D1.1 *
)
1. dig. input block
0x2000
(0x6000)
2
0 0 0 0 0 0 D5.2 D5.1 *
)
2. dig. input block
*
)
D1.1 = Data bit module 1 channel 1, D1.2 = Data bit module 1channel 2, etc.
To 2) Index the data of the digital 4 channel output module:
Index:
Sub-
Index:
Contents: Description:
0
1
number of dig. 8 Bit input blocks
0x2100
(0x6200)
1
0 0 0 0 D1.4 D1.3 D1.2 D1.1 *
)
dig. output block
*
)
D1.1 = Data bit module 1 channel 1, D1.2 = Data bit module 1 channel 2, etc.
To 3) Index the data of the 2 analog 2 channel output modules:
Index:
Sub-
Index:
Contents: Description:
0
4
number of 2 Byte specialty channels
1 D1.1
*
)
1. output channel
2 D1.2
*
)
2. output channel
3 D2.1
*
)
3. output channel
0x2500
(0x6411)
4 D2.2
*
)
4. output channel
*
)
D1.1 = Data word module 1 channel 1, D1.2 = Data word module 1 channel 2, etc.
